1 Crane, S. W. Occurrence and management of obesity in companion animals. J Small Anim Pract 32, 275-282 (1991).
2 Edney, A. T. & Smith, P. M. Study of obesity in dogs visiting veterinary practices in the United Kingdom. Vet Rec 118, 391-396 (1986).
3 German, A. J. The growing problem of obesity in dogs and cats. J Nutr 136, 1940S-1946S (2006).
4 Lund, E. M. A., P.J.; Kirk, C.A.; Klausner, J.S. Prevalence and Risk Factors for Obesity in Adult Dogs from Private US Veterinary Practices. Intern J Appl Res Vet Med 4, 177-186 (2006).
5 McGreevy, P. D. et al. Prevalence of obesity in dogs examined by Australian veterinary practices and the risk factors involved. Vet Rec 156, 695-702 (2005).
6 Yeates, J. W. & Main, D. C. Veterinary surgeons’ opinions on dog welfare issues. J Small Anim Pract 52, 464-468, doi:10.1111/j.1748-5827.2011.01095.x (2011).
7 German, A. J. et al. Quality of life is reduced in obese dogs but improves after successful weight loss. Vet J 192, 428-434, doi:10.1016/j.tvjl.2011.09.015 (2012).
8 Kealy, R. D. et al. Effects of diet restriction on life span and age-related changes in dogs. J Am Vet Med Assoc 220, 1315-1320 (2002).
9 Lawler, D. F. et al. Diet restriction and ageing in the dog: major observations over two decades. Br J Nutr 99, 793-805, doi:10.1017/S0007114507871686 (2008).
10 Zoran, D. L. Obesity in dogs and cats: a metabolic and endocrine disorder. Vet Clin North Am Small Anim Pract 40, 221-239, doi:10.1016/j.cvsm.2009.10.009 (2010).
11 Raffan, E. The big problem: battling companion animal obesity. Vet Rec 173, 287-291, doi:10.1136/vr.f5815 (2013).
12 Yeo, G. S. & Heisler, L. K. Unraveling the brain regulation of appetite: lessons from genetics. Nature Neuroscience 15, 1343-1349, doi:10.1038/nn.3211 (2012).
13 Appleyard, S. M. et al. A role for the endogenous opioid beta-endorphin in energy homeostasis. Endocrinology 144, 1753-1760, doi:10.1210/en.2002-221096 (2003).
14 Day, F. R. & Loos, R. J. Developments in obesity genetics in the era of genome-wide association studies. J Nutrigenet Nutrigenomics 4, 222-238, doi:000332158 [pii] 10.1159/000332158 (2011).
15 O’Neill, D.G., Church, D. B., McGreevy, P. D., Thomson, P. C. & Brodbelt, D. C. Prevalence of disorders recorded in dogs attending primary-care veterinary practices in England. PLoS One 9, e90501, doi:10.1371/journal.pone.0090501 (2014).
16 Carnell, S. & Wardle, J. Measuring behavioural susceptibility to obesity: validation of the child eating behaviour questionnaire. Appetite 48, 104-113, doi:10.1016/j.appet.2006.07.075 (2007).
17 Llewellyn, C. H., van Jaarsveld, C. H., Johnson, L., Carnell, S. & Wardle, J. Development and factor structure of the Baby Eating Behaviour Questionnaire in the Gemini birth cohort. Appetite 57, 388-396, doi:10.1016/j.appet.2011.05.324 (2011).
18 Gibbons, C., Finlayson, G., Dalton, M., Caudwell, P. & Blundell, J. E. Metabolic Phenotyping Guidelines: studying eating behaviour in humans. The J Endocrinology 222, G1-12, doi:10.1530/joe-14-0020 (2014).
19 Butterwick, R. F. & Markwell, P. J. Effect of amount and type of dietary fiber on food intake in energy-restricted dogs. Am J Vet Res 58, 272-276 (1997).
20 Hewson-Hughes, A. K. et al. Geometric analysis of macronutrient selection in breeds of the domestic dog, Canis lupus familiaris. Behavioral ecology : official journal of the International Society for Behavioral Ecology 24, 293-304, doi:10.1093/beheco/ars168 (2013).
21 Robbins, L. A., Mason, J. R. & Fowkes, P. D. An apparatus for studying operant activity of captive coyotes. Behavior research methods, instruments, & computers : a journal of the Psychonomic Society, Inc 32, 566-571 (2000).
22 Vester Boler, B. M. et al. Acute satiety response of mammalian, avian and fish proteins in dogs. Br J Nutr 107, 146-154, doi:10.1017/s0007114511002261 (2012).
23 Weber, M. et al. A high-protein, high-fiber diet designed for weight loss improves satiety in dogs. J Vet Intern Med 21, 1203-1208 (2007).
24 Bosch, G. et al. The effects of dietary fibre type on satiety-related hormones and voluntary food intake in dogs. Br J Nutr 102, 318-325, doi:10.1017/s0007114508149194 (2009).
25 Altman, D. Practical Statistics For Medical Research. Pages 420-424 (Chapman & Hall, 1990).